Heavy rain is expected in much of Greater Bangkok for the next few days and flash floods are possible in other areas of the country, the Meteorological Department warned on Wednesday.
Forecasters said rain or thunderstorms are likely over more than half of the capital and its next-door provinces.
The eastern provinces can expect more rain, along with some areas in the northeastern and southern regions, it said. The rain this week is due to the active monsoon trough and a low-pressure area over the country, the department said.
Heavy rain briefly pounded several districts in Bangkok on Wednesday. Phra Khanong was hardest hit by the downpour with 61.5 millimetres of rain, the Bangkok Metropolitan Administration reported. Some roads in 12 districts were flooded before the water drained later in the day.
The flood situation remained serious in Kalasin, Phitsanulok and Satun due to the impact of storm Doksuri, which flooded 12 provinces from Friday to Tuesday, according to an update by the Disaster Prevention and Mitigation Department released on Wednesday. Floods have eased in the nine other provinces.
Department director-general Chatchai Promlert expressed concern about the rising level of the Yom River, with provinces it flows through vulnerable to fresh flooding.
Provinces regularly flooded by the Yom are Sukhothai, Phitsanulok and Pichit.